Wurtzite structure gallium nitride (GaN) thin film was grown on a c-plane sapphire (0001) substrate through spin coating method followed by nitridation process. Readily available and cheap gallium (III) nitrate hydrate (Ga(NO3)3·xH2O) powder was used as the gallium source. Besides that, ethanol-based precursor solution which has better wetting properties and fast evaporation rate was prepared. ...

RAMACHANDRAN, RAMYA. Investigation of Surface States in Gallium Nitride Devices using a New High Frequency Measurement Technique. (Under the direction of Dr. Douglas W. Barlage). Surface states place a limitation on the high-frequency behavior of Gallium Nitride devices by causing RF dispersion. They are also a source of undesirable 1/f noise. This thesis specifically aims to explore techniques...

Polystyrene sulfonate polymer brushes, grown on the interior of the microchannels in a microreactor, have been used for the anchoring of gallium as a Lewis acid catalyst. Initially, gallium-containing polymer brushes were grown on a flat silicon oxide surface and were characterized by FTIR, ellipsometry, and X-ray photoelectron spectroscopy (XPS). XPS revealed the presence of one gallium per 2-...

The MSW solution to the solar neutrino problem for non-standard solar models. Abstract The difficulties for non-standard solar models (NSSM) in resolving the solar neutrino problem are discussed stressing the incompatibility of the gallium– Kamiokande data, and of the gallium–chlorine data. We conclude that NSSM's cannot explain simultaneously the results of any two of the solar neutrino data (...

A gallium phosphide photovoltaic junction is reported. Using a n–p structure, a gallium phosphide junction is grown on a gallium phosphide substrate by molecular beam epitaxy. Junction design is presented with measurements of the dark and light response. The light current was measured under an illumination of air mass (AM) 1.5. Without an anti-reflective coating, a Voc of 1.53V and a Jsc of 0:9...

Ultraviolet plasmonics (UV) has become an active topic of research due to the new challenges arising in fields such as biosensing, chemistry or spectroscopy. Recent studies have pointed out aluminum, gallium, magnesium and rhodium as promising candidates for plasmonics in the UV range. Aluminum and magnesium present a high oxidation tendency that has a critical effect in their plasmonic perform...

Anonymous. Bacteriuria-when does it matter ? [Editorial]. Lancet 1979;ii 1166-7. Kass EH. The search for asvmptomatic pyelonephritis. N EnglJ Med 1972;287: 563-4. Davidson AJ, Tainer LB. Urographic and angiographic abnormalities in adult onset acute bacterial nephritis. Radiology 1973;106:249-56. 'Cameron DD, Azimi F. The value of excretory urography in the diagnosis of acute pyelonephritis. J ...

introduction gallium-67 (67ga) has been used as a radionuclide for imaging a variety of solid tumors since 1969. since then use of various gallium-based radiotracers has been reported. recently, 67ga-labeled acetylacetate bis(thiosemicarbazones) (67ga-aats) complex with significant tumor accumulation and fast blood clearance has been employed. materials and methods in this study, the absorbed d...

Enormous progress has been made in recent years on a number of photovoltaic (PV) materials and devices in terms of conversion efficiencies. Ultrahigh-efficiency (>30%) PV cells have been fabricated from gallium arsenide (GaAs) and its ternary alloys such as gallium indium phosphide (GaInP2). The high-efficiency GaAsbased solar cells are being produced on a commercial scale, particularly for spa...

Received 4/8/2008; revised 7/3/2008; accepted 7/7/2008. For correspondence and reprints contact: Nan-Tsing Chiu, M.D., Department of Nuclear Medicine, Medical College, National Cheng Kung University. 138 ShengLi Road, Tainan 704, Taiwan. Tel: (886)6-2353535 ext. 2474, Fax: (886)62766609, E-mail: [email protected]. We present the case of a 71-year-old man experiencing sudden onset of consc...